JavaScript Harp Key Chart

Here's the scene. It's 1 AM. You've had 9 beers and it's time for
you to impress the ladies. The band calls "Key to the Highway" in Db. You
want to play in 7th position. You just can't do the math in your head. Luckily
you have your laptop and cellular modem. You dial into you ISP and connect
to the JT30 page. You click on the JavaScript Harp Key Chart and then click
on Db. You grab your G harp and start to wail. Isn't Technology wonderful!

I don't use the sharp notation (#) of a key just to keep it simple.
The keys on harmonicas
use either (eg. F#,Gb. F# should be the same as Gb.)
depending on the manufacturer.
If this causes some minds to go off into
Hobgoblin states then I apologise.

This is my first attempt to learn JavaScript and eventually Java. It is
very much brute force with no finesse, but I hope to get better at this as
I go along. - KPG.